tbask



4 Sheets-Sheet 2. L. C. TRASK.

GAGE LATHB.

8 my m 1 nn. v M M y 1 u W TU v1 a .d B e t n e C .M m P .Y Q i Qu m /WW////// m.. ,N s m M 1 8 8, m .l M 4 W 0. N

No Model.)

(No Model.) A 4 sheets-sheen a. l L. C. TRASK.

GAGE LATHB.

ATTORNEY.

(No Model.)

GAGE LATHE.

4 'Sheetsv-Sheet 4. TRASK. v

-Patented July 5, 1892.-

ww/jing Bmw. @um

ATTORNEY.

UNITED STATES PATENT OFFICE.

LUOIUS C. TRASK, OF GREENWOOD, MAINE, ASSIGNOR TO EUGENE L. TEBBETS, OF SAME PLACE.

GAG E-LATH E.-

SPECIFICATION forming part of Letters Patent No. 478,178, dated July 5, 1892. Application led February 9, 1889. Serial No. 29 9,339. (No model.)

To a/ZZ whom it may con/cern,.-

Be it known that I, Lucius C. TRAsK, acitizen of the United States, residing at Greenwood, in the county of .Oxford and State of Maine, have invented certain new and useful Improvements in Gage-Lathes, of which the following is a specification.

My invention relates to a class of lathes by which thread spools and similar small wooden articles are made automatically from suitable sticks. A lathe of this sort may be considered as made up of a combination ot' parts for forming rough blanks for spools, &c., a second combination for iinishing these rough blanks, and an automatic linger-motion for transferring the rough blanks from the first combination to the second, all coacting as parts of one machine to produce automatically-finished spools from roughly sawed or turned sticks. The general construction and mode of operation of such lathes are fully set forth in the specication of United States Patent No. 235,562, which was issued to John M. Parker December 14, 1880.

The object kof my invention is to provide a machine which shall be more convenient and accurate in its adjustment and operation and less liable t0 breakages and disarrangement than those heretofore in use. In the operation of lathes of this sort grooved rollers feed a squared stick into a hollow revolving tool, called a rougher,7 which turns it to a cylindrical form. After passing through a guidebushing in the end of the hollow arbor of the rougher the stick is seized by a pair of gripping-jaws, Which are mounted upon a sliding plate that has a back-and-forth motion corresponding to the length of the spool or other piece to be turned. The stick next passes over a supporting-standard, upon which it is clamped by a vertically-moving jaw, While a swinging saw cuts off a spool-blank and a bit bores a central hole through it. This spoolblank is held in place until it is seized by the fingers, which carry it to the revolving arbor, upon which it is inished.

In the lathe as heretofore constructed it is extremely difficult t0 keep the gripping-jaws from cramping the stick against the guidebushing of the rougher. My invention comprises efticient means of adjusting these 'gripping-jaws.

My'invention further comprises a device by means of which the stickis moved backward from short blocks catching between the sliding frame of the gripping-jaws and the clamping-jaw or its support.

My invention further consists in introducing between the swinging arm which carries the linger-motion and the cam which actuates it an intermediate swinging arm turning upon the same axis and havingA an adjustable connection with the arm'irst mentioned.

e My invention further comprises an improved connection between the feed-rolls and gripping-jaws -and an'attachment whereby I am enabled to stop the machine from either end.

In the accompanying drawings I have only shown so much of the lathe as is necessary to m'ake'plain the Working of Amy improvements therein, omitting, for greater clearness various details well known in the construction of lathes of this sort and for the most part fully vset forth in the above-mentioned United States Patent No. 235,562.

Figure 1 is a backV elevation of the machine, showing the parts which form the rough blanks. Fig. 2 is a partial longitudinal section through the center line of the roughing and boring tools. It also shows in dotted line and partial section the improved co'nnection between the two devices for feeding the rough stick. Fig. 3 is a cross-section through the line no of Fig. 1. Fig. 4 is a cross-section through the line M063 of Fig. 1. Fig. 5 is a partial front elevation showing the power connections of the cam-shaft from which the IOO automatic movements of the machine are derived and the mechanism for stopping this cam-shaft from either end ot' the machine.

In the figures, A is the main frame of the machine.

C is a camshaft from which the principal autolnatic movements of the machine are derived.

E is a cam from which the back-andforth movements of the sliding plate Gare derived through the rollers e e', which are attached to its under side.

T is a supporting-piece rigidly attached to the sliding plate G and carrying the sliding jaws II, the swinging arms i t, the adjustingscrews t t, the springs n n', and the wedge c and cam d.

Q is a projection on the cam E, from which the specialbackward motion herein described is derived.

n2 is a spring which reacts through the rod q2 against the motion produced by the projection Q.

g is an adjusting-nut upon the rod Q2.

a, is an arm carrying the pawl which turns the feed-wheels.

j' is a slotted piece adjustable upon the back of a; c', a rod connecting f with G.

h is the rougher; h', the guide-bushing.

W is the cam from which the motion of the clamping-jaw is derived.

fr is a roller bearing upon the cam W; y, a swinging arm upon the rock-shaft B; 91,3, a spring reacting against the cam IV; Z, a second arm moving with the rock-shaft l5; q, a rod connecting Z with the clamping-jaw b; n, a spring acting to pull the jaw b upward; D', a sidewise projection of the jaw l); m, a supporting-piece for the spool-blank; m', a sidewise projection of m; g2, a pressure-rod reacting between the supporting-piece m and the frame F of the boring device; g', an adjusting-nut upon g3.

P is a swinging arm upon which the fingermot-ion is mounted, that carries the spoolblanks to the iinishing-arbor.

N is a cam from which the arm P derives its motion; S, an intermediate swinging arm transmitting motion from the cam N to the arm P.

fu is an adjustable connection between S and P.

The eccentric W 2 transmits through the eccentric-rod K a vibrating motion to the piece K2, upon which are mounted the tools which finish the surface of the spool.

S2 is the cutting-off saw, mounted upon the swinging frame K3, which receives its mot-ion -from the cam 73.

C2 is the boring-shaft, which receives a backand-forth motion from the cam IV through the sliding fork K4. To this sliding fork is attached the rod 7e, Fig. 2. Pins upon the upper surface of 7o strike the crank K and turn the cam cl through a suicient angle to draw down the wedge c', the amount necessary to tighten the jaws I I upon the stick to be fed forward.

M in Fig. 5 is the pulley which drives, th rough an intermediate gear, the cam-shaft C.

T2 is a tightening-pulley which is pressed against the driving-belt of M by lifting the lever H, which, when lifted, is supported by the catch K2.

X X are projecting pieces upon the front of the machine, which support the swinging frame that carries the tools for finishing the spool.

q is a rod sliding Jthrough X X.

ui is a spring which presses K2 outward; g2, a stop which limits its motion in that direc-` tion, and 112 a handle by which the catch K2 is pulled from under II.

In using my invention I Iirst adj ust the sliding piece f upon the ratchet-arm a until the motions of the feed-wheels and of the gripping-jaws are in proper relation. The gripping-jaws I I are then adjusted by turning the screws t t until the turned rod moves freely through the guide-bushing h. I then adjust the pressure-rod q2 by means of the nut g until it is so firmly fixed that it will be sure to transmit to the frame of the boring device any pressure upon the clamping-jaw b or its connections which comes from the direction of the gripping-jaws. I then adjust the angular distance between the arms S and P until the finger-arm l? assumes the position shown in` Fig. 3 at one end of its motion and the position shown in Fig. 4 at the other. The peculiarities of this finger-motion form no part of my present invention and are fully set forth in Parkers United States Patent hereinbefore mentioned. When the machine is set in motion, the projection upon the cam E moves the gripping-jaws I I and the stick which they hold back a sufficient distance to permit the carrying-ingerto pass with safety between the stick andthe severedblock. The spring n2, acting through the rod q2, prevents the inertia ot the moving parts from carrying them farther back after the cam ceases to act. The cam lV, acting through the rock-shaft B and its connections, causes the clamping-jaw to press down upon the end of the stick until the spool-blank is severed and seized by the carrying-iingers. The projections b and m seize the stick quite closely to the cutting-oit saw; but if a block happens to be sawed oi which is not held properly by the clampingjaw it usutlly falls under the overhanging piece fm', and even if a block happens to be caught in any way between the gripping and the clamping apparatus the rod q2' transmits a part ot the strain to the frame of the boring device and the block is crushed without damage to the machine.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

l. In an automatic spool-lathe, grippingjaws for the rough-turned stick, which are ICO IIO

mounted upon a sliding plate, and a roller byY which motion is transmitted to the sliding plate from the actuating-cam, in combinationv with a projection upon vthe back of theactuating-cam and a spring reacting against the projection when the said projection is placed at such a point upon the cam that it acts to move the plate back While the jaws are gripped upon the stick and after the saw has cut off the block, all as and for the purpose set forth.

2. The combination of the sliding plate G, connecting-rod c', arm a, and feed-rolls actuated thereby, with a slotted connecting-piece mounted upon the back of arm a for the pur# pose of Vai-yin g its Working length.

3. The combination ofa vertically-clamping jaw b, having a projecting partb, witha supporting-piece fm, having a similar projectionhm, all as and for the purpose set forth.

4. yThe combination of the finger-motion arm P, cam N, intermediate arm S, and adjustable connection V, all as and for the purpose set forth.

5. In an .automatic spool-lathe in which spool-blanks are severed from the end of a turned stick, a clamping-jaw Whichholds the severed blank in place While being bored, a rock-shafjointed connections between the jaw and the rock-shaft, and a cam upon the principal 'cam-shaft, which imparts motion to the rock-shaft, all in combination with each other and with a boringtool which bores an axial hole in the block and a cutting-off saw which moves at right angles thereto, substantially as specified.

LUCIUS C. TRASK.

Witnesses:

TIMOTHY M. BEAN, FRED H. MoR'roN. 

